Method for puncturing an LDPC channel code
US7657824B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 27, 2005 |
| Grant date | Feb 2, 2010 |
| Priority date | — |
| Expiry date | Mar 1, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/635
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method for puncturing a low density parity check (LDPC) code that is decoded through a parity check matrix expressed by a factor graph including check nodes and bit nodes connected to the check nodes through edges. The method includes classifying the bit nodes mapped to a parity part of a codeword into hierarchical groups according to their decoding facilities when the bit nodes are punctured, determining puncturing order of the groups, and sequentially performing puncturing on the bit nodes from a bit node belonging to a corresponding group according to the puncturing order of the groups to acquire a codeword with a desired coding rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.